North Germanic tribes are the Germanic tribes that left Scandinavia late on the second phase of the migration period, that took place between AD 500 and 900, and those whose people are still there nowadays. However, some people of East and West Germanic tribes did not migrate with their tribes, staying in Scandinavia, and their East and West Germanic languages evolved into dialects of North Germanic, due to contact with North Germanic tribes and/or cultural assimilation.

Two North Germanic tribes are the Daner (Dani), that gave their name to Denmark, and the Suiones (Svear), that gave their name to Sweden. According to Jordanes, the Dani and the Suiones (named by him Suetidi) were of the same stock.

An example of a West Germanic tribe being culturally assimilated by a North Germanic one, is the assimilation of the Jutes that hadn't left Jutland and have been incorporated into the Dani. And an example of an East Germanic tribe being assimilated is the assimilation of the Goths that stayed in Sweden by the Suiones.

Today's North Germanic?speaking people are the Norwegians, Danes, Swedes, Icelanders and Faroese.